Adds expires to supported options (#181)

* Adds expires to supported options

* Use existing test

Author: Ross-Hunter

README.md

@@ -236,6 +236,7 @@ builder.url_for("http://images.example.com/images/image2.jpg")
 - [filename](https://docs.imgproxy.net/#/generating_the_url_advanced?id=filename)
 - [format](https://docs.imgproxy.net/#/generating_the_url_advanced?id=format)
 - [return_attachment](https://docs.imgproxy.net/#/generating_the_url_advanced?id=return-attachment)
+- [expires](https://docs.imgproxy.net/#/generating_the_url?id=expires)
 
 _See [imgproxy URL format guide](https://docs.imgproxy.net/#/generating_the_url_advanced?id=processing-options) for more info._
 

lib/imgproxy.rb

@@ -101,6 +101,7 @@ def configure
     # @option options [String] :filename
     # @option options [String] :format
     # @option options [Boolean] :return_attachment
+    # @option options [Integer] :expires
     # @option options [Boolean] :use_short_options
     # @option options [Boolean] :base64_encode_urls
     # @option options [Boolean] :escape_plain_url

lib/imgproxy/options.rb

@@ -65,6 +65,7 @@ class Options < Hash
       filename:               Imgproxy::OptionsCasters::String,
       format:                 Imgproxy::OptionsCasters::String,
       return_attachment:      Imgproxy::OptionsCasters::Bool,
+      expires:                Imgproxy::OptionsCasters::Integer,
     }.freeze
 
     META = %i[size resize adjust].freeze

lib/imgproxy/options_aliases.rb

@@ -40,5 +40,6 @@ module Imgproxy
     auto_rotate: :ar,
     filename: :fn,
     return_attachment: :att,
+    expires: :exp,
   }.freeze
 end

spec/imgproxy_spec.rb

@@ -121,6 +121,7 @@
         filename: "the_image.jpg",
         format: :webp,
         return_attachment: true,
+        expires: Time.at(4810374983),
       }
     end
 
@@ -166,7 +167,8 @@
       "scp:0/"\
       "ar:1/"\
       "fn:the_image.jpg/"\
-      "att:1"
+      "att:1/"\
+      "exp:4810374983"
     end
 
     let(:casted_options_full) do
@@ -210,7 +212,8 @@
       "strip_color_profile:0/"\
       "auto_rotate:1/"\
       "filename:the_image.jpg/"\
-      "return_attachment:1"
+      "return_attachment:1/"\
+      "expires:4810374983"
     end
     # rubocop: enable Layout/LineEndStringConcatenationIndentation